Accession Number : ADA182490

Title :   Flexible Fiber Optics Bundle Study. Effect of Number of Active Fibers on Symbol Legibility.

Descriptive Note : Technical rept.,

Corporate Author : HARRY G ARMSTRONG AEROSPACE MEDICAL RESEARCH LAB WRIGHT-PATTERSON AFB OH

Personal Author(s) : Kama,William N ; Bridenbaugh,John ; Task,H L

PDF Url : ADA182490

Report Date : Mar 1987

Pagination or Media Count : 31

Abstract : To assess and evaluate the utility of Flexible Fiber Optics Bundles (FFOB) as image transmitters, a study was performed to determine what effect the number of active fibers across a given symbolic character would have on the legibility of the character. Twelve subjects performed a symbol identification task in which the symbols were displayed through either a rectangular or a hexagonal format FFOB. The symbols viewed varied in terms of the number of elements per letter height and in angular subtense. Subject performance was evaluated in terms of correct identifications, response times for correct identifications, misses, and false identifications. Major findings of this study indicate that (1) performance with the hexagonal bundle was superior to that with the rectangular bundle, and (2) performance improved as the number of elements per letter height increased, near optimal performance occurring at 8.7 elements or more and angular subtenses greater than 18 minutes of arc. The latter finding compares favorably with findings in the relevant literature.

Descriptors :   *SYMBOLS, *FIBER OPTICS, *IMAGES, *BUNDLES, IDENTIFICATION, RECTANGULAR BODIES, RESPONSE, FORMATS, FIBERS, TRANSMITTERS

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE